Phase plate technology for laser marking of magnetic discs
Abstract
An advanced design for a phase plate enables the distribution of spots in arbitrarily shaped patterns with very high uniformity and with a continuously or near-continuously varying phase pattern. A continuous phase pattern eliminates large phase jumps typically expected in a grating that provides arbitrary shapes. Large phase jumps increase scattered light outside of the desired pattern, reduce efficiency and can make the grating difficult to manufacture. When manufacturing capabilities preclude producing a fully continuous grating, the present design can be easily adapted to minimize manufacturing errors and maintain high efficiencies. This continuous grating is significantly more efficient than previously described Dammann gratings, offers much more flexibility in generating spot patterns and is easier to manufacture and replicate than a multi-level phase grating. 3 figs.
- Inventors:
- Issue Date:
- Research Org.:
- Univ. of California (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 675848
- Patent Number(s):
- 5828491
- Application Number:
- PAN: 8-777,680
- Assignee:
- Univ. of California, Oakland, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 27 Oct 1998
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; DESIGN; LASER RADIATION; MASKING; GRATINGS; MAGNETIC DISKS; EFFICIENCY
Citation Formats
Neuman, B, Honig, J, Hackel, L, Dane, C B, and Dixit, S. Phase plate technology for laser marking of magnetic discs. United States: N. p., 1998.
Web.
Neuman, B, Honig, J, Hackel, L, Dane, C B, & Dixit, S. Phase plate technology for laser marking of magnetic discs. United States.
Neuman, B, Honig, J, Hackel, L, Dane, C B, and Dixit, S. Tue .
"Phase plate technology for laser marking of magnetic discs". United States.
@article{osti_675848,
title = {Phase plate technology for laser marking of magnetic discs},
author = {Neuman, B and Honig, J and Hackel, L and Dane, C B and Dixit, S},
abstractNote = {An advanced design for a phase plate enables the distribution of spots in arbitrarily shaped patterns with very high uniformity and with a continuously or near-continuously varying phase pattern. A continuous phase pattern eliminates large phase jumps typically expected in a grating that provides arbitrary shapes. Large phase jumps increase scattered light outside of the desired pattern, reduce efficiency and can make the grating difficult to manufacture. When manufacturing capabilities preclude producing a fully continuous grating, the present design can be easily adapted to minimize manufacturing errors and maintain high efficiencies. This continuous grating is significantly more efficient than previously described Dammann gratings, offers much more flexibility in generating spot patterns and is easier to manufacture and replicate than a multi-level phase grating. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 27 00:00:00 EST 1998},
month = {Tue Oct 27 00:00:00 EST 1998}
}